Bump cryptography from 3.0 to 3.1

Created by: dependabot-preview[bot]

Bumps cryptography from 3.0 to 3.1.

Changelog

Sourced from cryptography's changelog.

3.1 - 2020-08-26

• BACKWARDS INCOMPATIBLE: Removed support for idna based U-label parsing in various X.509 classes. This support was originally deprecated in version 2.1 and moved to an extra in 2.5.
• Deprecated OpenSSL 1.0.2 support. OpenSSL 1.0.2 is no longer supported by the OpenSSL project. The next version of cryptography will drop support for it.
• Deprecated support for Python 3.5. This version sees very little use and will be removed in the next release.
• backend arguments to functions are no longer required and the default backend will automatically be selected if no backend is provided.
• Added initial support for parsing certificates from PKCS7 files with ~cryptography.hazmat.primitives.serialization.pkcs7.load_pem_pkcs7_certificates and ~cryptography.hazmat.primitives.serialization.pkcs7.load_der_pkcs7_certificates .
• Calling update or update_into on ~cryptography.hazmat.primitives.ciphers.CipherContext with data longer than 2^31^ bytes no longer raises an OverflowError. This also resolves the same issue in /fernet.

Commits

• ba2c0e5 3.1 release (#5430)
• c63106c Build manylinux wheels with Zuul (#5386)
• bda1387 new black, actually slightly different than the old black (#5429)
• 0b24359 remove keywords with side effects hack in setup.py (#5426)
• 1394edb rephrase changelog entry (#5422)
• b9d26d2 add some words about separating ECDH and ECDSA (#5423)
• ed3ded4 bump libressl 3.1.x (#5421)
• b6c51be document that we auto-chunk on symmetric cipher contexts now (#5420)
• f90ba18 chunked update_into (#5419)
• bc4b956 Run AWS SDK tests on Python 3.7 (#5414)
• Additional commits viewable in compare view

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